Which image illustrates refraction?

Answer:

Primero, definimos el desplazamiento como la distancia entre la posición final y la posición inicial.

Así, si comenzamos abajo, luego subimos la escalera, y luego bajamos, la posición final y la posición inicial serán la misma

por lo que el desplazamiento es igual a cero.

La medida recorrida es el espacio total recorrido.

Es decir, si entre el principio y el final de la escalera hay una distancia D.

La persona que sube y baja, recorre esta distancia dos veces.

Entonces cuando una persona sube y baja la escalera, la medida de su trayectoria será 2*D.

Answer:

gas

................

Explanation:

hope it helps u

Answer:

90 km/h

50 m/s

Explanation:

Distance = 450 km

Time = 5hrs

Speed = Distance/Time

450/5 = 90 km/h

1 km = 1,000 m

1 hr = 60m = 60 x 60 = 3,600 sec

but since it's 5hrs = 60 x 300m = 18,000

90 x 1,000 = 90,000/18,000 = 50 m/s

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The units of supplementary quantities are dimensionless units.

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Answer:

-10/9 m

Explanation:

Radius of curvature, R=2 m

Focal length of mirror, f=R/2=2/2=1 m

Let height of object=h

Height of image, h'=h-10h=-9h

We have to find the distance of object from the mirror.

Magnification, m= [tex]\frac{h'}{h}=-\frac{v}{u}[/tex]

[tex]m=\frac{-9h}{h}=-9[/tex]

Image is upright and small in size it means the mirror is convex.

Focal length of convex mirror is negative.

f=-1m

[tex]-9=-\frac{v}{u}[/tex]

[tex]v=9u[/tex]

Now, mirror formula

[tex]\frac{1}{v}+\frac{1}{u}=-\frac{1}{f}[/tex]

[tex]\frac{1}{9u}+\frac{1}{u}=\frac{1}{1}[/tex]

[tex]\frac{1+9}{9u}=-1[/tex]

[tex]10=-9u[/tex]

[tex]u=-\frac{10}{9} m[/tex]

Hence, the distance of object  from the mirror is -10/9 m

Answer:

F = q v B    where B is the component  of the field perpendicular to v.

F = 1.6E-19 * 4E5 * 7E-5 = 4.48* 10^-18  N = 44.8 * E-19 N

Answer:

DISTANCE=800M

TIME=40s

Speed=20m/s

Explanation:

Have a nice day

Answer:

the distance is 800m

Explanation:

but i think its velocity

formula = D÷T

now 800m÷40

velocity=20m/s

Answer:

[tex]v=10^5\ m/s[/tex]

Explanation:

Given that,

Magnetic force acting on an electron, [tex]F=12.8\times 10^{-19}\ N[/tex]

The magnitude of the magnetic field,[tex]B=8\times 10^{-5}\ T[/tex]

We need to find the magnitude of the velocity. We know that the magnetic force is given by :

[tex]F=qvB[/tex]

Where

v is the velocity

So,

[tex]v=\dfrac{F}{qB}\\\\v=\dfrac{12.8\times 10^{-19}}{1.6\times 10^{-19}\times 8\times 10^{-5}}\\\\v=10^5\ m/s[/tex]

So, the magnitude of velocity is[tex]10^5\ m/s[/tex].

Answer:

LOL! couldnt be me either bestieeeee

Answer:

-_-

Explanation:

i dont know What was XD??

Group of answer choices.

A. James likes ch.atting with his coworkers but is easily distracted.

B. James does some of his coworkers' work because he wants to be popular.

C. James accepts additional tasks at work as a way to show he can handle greater responsibility.

D. James turns down additional tasks at work because he doesn't want more responsibility.

Answer:

C. James accepts additional tasks at work as a way to show he can handle greater responsibility.

Explanation:

An employee can be defined as an individual who is employed by an employer of labor to perform specific tasks, duties or functions in an organization.

Basically, an employee is saddled with the responsibility of providing specific services to the organization or company where he is currently employed while being paid a certain amount of money hourly, daily, weekly, or monthly depending on the contractual agreement between the two parties (employer and employee).

A productive employee is a kind of person that is highly effective and efficient in the performance of his or her duties, especially through the use of their skills, knowledge, competence and expertise (experience). Also, a positive attitude or attribute are ethical and morally right characteristics  (qualities) that a person exhibits.

Typically, there exist a strong relationship between a positive attitude and the level of productivity of an employee.

Hence, an example of the correlation of productivity and a positive attitude would be James accepting additional tasks at work as a way to show he can handle greater responsibility. Thus, he is more focused on challenging himself to handle greater responsibility by accepting additional tasks at his work place.

Answer:

M_b = 2M_a

Explanation:

From gravity equation, we know that;

g = GM/R²

Where;

g is acceleration due to gravity

G is the gravitational constant

M is mass

Thus, making mass(M) the subject, we have;

M = gR²/G

Since we want to find the mass of B so that value of g on B is half that of its value on A.

Thus;

> g_b = ½g_a

> g_b/g_a = ½

Also, we are told that;

> R_a = ½R_b

> R_b/R_a = 2

If M_a = g_a•R_a²/G

And M_b = g_b•R_b²/G

Thus;

M_b/M_a = (g_b•R_b²/G)/(g_a•R_a²/G)

G will cancel out to give;

M_b/M_a = (g_b•R_b²)/(g_a•R_a²)

Rearranging for ease of simplification, we have;

M_b/M_a = (g_b/g_a) × (R_b/R_a)²

Plugging in the relevant ratios gives;

M_b/M_a = ½ × 2²

M_b/M_a = 2

M_b = 2M_a

Answer:

-0.383 m

Explanation:

Diameter of cylinder = 4m  therefore  r = 2

height of cylinder ( H ) = 4 m

specific gravity = 0.6 ( assumed )

depth of immersion = 'h'

Determine the metacentric height

weight of cylinder in water = water displaced

= 0.6 * 1000 * πr^2* H = 1000 * πr^2* h

= 0.6 * 4 = h

∴ h = 2.4 m

hence the depth of center of buoyancy from free space = h /2 = 1.2 m

The metacentric height can be calculated using the formula below

Gm = Io / Vsubmerged  - BG

attached below is the remaining solution

Answer:

ghittu iihg उह्स उउह्स उग्य्किव जिक्ह्ब

Answer:

FeCl2 has a high melting point.

Explanation:

Answer:

The image is formed at 0.44 m in front of the mirror

magnification (M) = 0.44

Explanation:

Applying, mirror formular

1/f = (1/u)+(1/v).................... Equation 1

Where f = Focal length of the convex mirror, u = object distance, v = image distance.

Using the real is positive convection,

From the question,

Given: f = -1.6/2 = -0.8 m( The focal length of a convex mirror is vitual), u = 1.0 m

Substitute these values into equation 1

-1/0.8 = (1/v)+(1/1)

Solve for v

1/v = 1.25+1

1/v = 2.25

v = 1/2.25

v = 0.44 m

Hence the image is formed at 0.44 m in front of the mirror

Magnification (M) = v/u

m = 0.44/1

m = 0.44

Answer:

um .... D. D D D D D this should be it

Complete question is;

Mike lives in the northern United States (in Minnesota) and Nick lives in the southern United States (Louisiana). When they both feel insulted by the same individual, Nick will be more likely to have a(n) ________ cortisol response and show ________ levels of physical aggression.

Answer:

- A hyper cortisol response

- higher levels of physical aggression

Explanation:

In study of hormones in the human body, it has been discovered that cortisol is a stress inducing hormone. Now, if they are in the summer when it is hot, it has been proven that's when the cortisol hormone circulates in a very large manner in the blood. This leads to frustration and as well possibly physical aggression.

Nick will be more likely to have a(n) hyper cortisol response and show higher levels of physical aggression.

Cortisol has been identified as a stress-inducing hormone in studies of hormones in the human body.

Mike lives in the northern United States (in Minnesota) and Nick lives in the southern United States (Louisiana).

When they both feel insulted by the same individual, Nick will be more likely to have a(n) hyper cortisol response and show higher levels of physical aggression.

Cushing syndrome is a condition characterized by elevated cortisol levels. This disorder is caused by your body producing too much cortisol.

Similar symptoms can occur after large doses of corticosteroids, thus this should be cleared out before testing for crushing syndrome.

Cortisol has been identified as a stress-inducing hormone in studies of hormones in the human body. Now, if they are in the summer when it is hot.

It has been proved that the cortisol hormone circulates in the blood in a very significant amount. This causes irritation and, in some cases, physical aggressiveness.

Hence nick will be more likely to have a(n) hyper cortisol response and show higher levels of physical aggression.

To learn more about cortisol refer to the link

https://brainly.com/question/7519944

Answer:

The heat capacity of a body is defined as the heat required to raise it's temperature by me degree or one kelvin.while specific heat capacity of a substance is defined as the heat required to the temperature of a unit mass of it through one degree or one kelvin.

I hope it helps

Answer:

Q = Q

mcT = ml

100 x 4.2 x 25 = (50-18) l

l = 328

*Hope it helps*

The specific latent heat of fusion of the melted ice is 328.13 J/kg.

The specific latent heat of fusion of the melted ice is determined by applying the principle of conservation of energy as shown below;

Heat lost by the water = Heat gained by the ice

McΔθ = mL

where;

(100)(4.2)(25) = (32)L

32L = 10500

L = 328.13 J/kg

Thus, the specific latent heat of fusion of the melted ice is 328.13 J/kg.

Learn more about heat capacity here: https://brainly.com/question/16559442

Answer:

Explanation:

The direction of the vector implies only its angle, not its magnitude. The direction of the vector is found in

[tex]tan^{-1}(\frac{y}{x})[/tex] so

[tex]tan^{-1}(\frac{11.1}{-43.0})=-14.5[/tex] but since we are in QII (where x is negative and y is positive) we have to add 180 to this number to get a direction of 165.5 degrees

Answer:

B.

Explanation:

Makes more sense to me

Answer:

17. .343 seconds: 18.a .357: 18.b 64.5N

Explanation:

17. Since there is no friction, we can apply Newton's equation:

We can then use the kinematic equation:

Solve for t:

18.a We can use the friction formula:

Solving for kinetic friction of block mass 7kg:

18.b We should add all forces that will counteract the rightward acceleration.

Use Newton's equation:

Solve for [tex]F_{x}[/tex]

[tex]F_{a} +F_{fr} =F_{x}[/tex]

[tex]23.75N+40.75N=F_{x} =64.5N[/tex]

Answer: Your question is missing below is the question

Question : What is the no-friction needed speed (in m/s ) for these turns?

answer:

20.1 m/s

Explanation:

2.5 mile track

number of turns = 4

length of each turn = 0.25 mile

banked at 9 12'

Determine the no-friction needed speed

First step : calculate the value of R

2πR / 4 =  πR / 2

note : πR / 2 = 0.25 mile

∴ R = ( 0.25 * 2 ) / π

      = 0.159 mile ≈ 256 m

Finally no-friction needed speed

tan θ = v^2 / gR

∴ v^2 = gR * tan θ

 v = √9.81 * 256 * tan(9.2°)  = 20.1 m/s

the scientific study of natural forces such as light, sound, heat, electricity, pressure, etc.

Answer:

Heat capacity, Q = 38500 Joules

Explanation:

Given the following data;

Mass = 2 kg

Initial temperature, T1 = 30°C

Final temperature, T2 = 80°C

Specific heat capacity of copper = 385 J/Kg°C

To find the quantity of heat required;

Mathematically, heat capacity is given by the formula;

[tex] Q = mcdt [/tex]

Where;

Q represents the heat capacity or quantity of heat.

M represents the mass of an object.

C represents the specific heat capacity of water.

dt represents the change in temperature.

dt = T2 - T1

dt = 80 - 30

dt = 50°C

Substituting the values into the formula, we have;

[tex] Q = 2 * 385*50[/tex]

Heat capacity, Q = 38500 Joules

Answer:

Explanation: The Wheatstone bridge is the interconnection of four resistances forming a bridge. ... To find the value of unknown resistance the deflection on galvanometer made to zero by adjusting the variable resistor. This point is known as balance point of Wheatstone bridge

Answer:

1) 4,422 meters.

2) 14.01 meters.

Explanation:

A round in a circular track means a complete rotation around its perimeter.

So, if the circular track is 44 meters long, 100.5 rounds around it means that the object did travel the 44 meters 100.5 times.

a) The total distance traveled by the object is:

44m*100.5 = 4,422 meters.

b) The displacement is defined as the distance between the final position and the initial position.

Notice that if you do a complete round, you end in the same position that you started.

So if you do 100 rounds, you end in the same position that you started.

If you do 100.5 rounds, we can think this as:

100 rounds + 0.5 round

So you pass for the starting point 100 times, and then you do half a round, this means that you end in the exact opposite part of the circle of the one where you started.

Then the displacement, the distance between the final position and the initial position, is equal to the diameter of the circle.

We know that the perimeter of the circle is 44m

And remember that the perimeter of a circle of diameter D is:

P = 3.14*D

Then the diameter if this circle is given by:

44m = 3.14*D

44m/3.14 = D = 14.01m

The displacement is 14.01m